Lubricating composition



Patented Aug. 8, 1944 f Le Grand Morell, deceased, late of Midland, Mich., by Edith Morell, administratrix,. Midland, Mich., and Amos T. Knntson, Midland, Mich.,

\ assignors to The Dow Chemical Company, Midland, MiclL, a corporation of Michigan No Drawing. Application April 1 1, 1939, Serial No. 267,334

3 email (01. 252-43) ethane so that the ultimate composition will con This application .isa continuation in part of our co-pending application Serial No. 733,452, filed July 2, 1934.

This invention relates to compositions of matter which are predominantly mineral oil and which have included therein minor amounts of hexachloroethane.

More specifically, our invention relates to compositions of matter of the type above identified which may be employed to particular advantage between relatively moving metallic surfaces which operate under relatively high pressures per unit area. Such conditions are encountered in metal cutting between the tool and the work and between the chip orshaving and the tool during the cutting operation. Compositions of this character are obviously also useful in other environments where it is desired to prevent seizure, scoring or galling of relatively moving metallic parts which are subjected to extreme pressures. Examples of such other environments are die-drawing, stamping 'etc., these all being a part of the general field of lubrication.

It is a principal of our invention, therefore, to provide a composition of the character described which is particularly suited for the purposes stated.

Other objects of our invention will appear as the description proceeds.

To the accomplishment, of the foregoing and related ends, said invention, then, consists of the dicated, optionally contain minor amounts of tain .02% to 3% by weight'of combined chlorine.

The base to which the hexachloroethane is added is mineral oil, as above indicated; Any suitable mineral oil may be employed depending upon the use for which the compounded composition is designed. The usual requirements as to viscosity for best performance for the particular use should be observed in .the preparation of the compositions of our invention. For example, for the purpose of preventing seizure and scoring between relatively moving metallic surfaces operating at very high speeds, the viscosity should be rather low, this being the basis for our preference for oils of light or medium grade for most uses, such'as cutting oils and the like.

The compositions of our invention may, as insoap, sulfur or sulfur compounds. The soap will function as a bodying agent and will be found to be of particular assistance when the oil base containing the hexachloroethane is emulsified with water. I

The sulfur orsulfur compounds being in themselves extreme pressure addition agents, will cooperatively with the hexachloroethane impart the desired extreme pressure characteristics to the composition.

We have found that the following are particuethane for the purposes specified:

means hereinafter fully described and particularly pointed out in the claims.

The following description sets forth in-detail certain approved combinations of ingredients embodying our invention, such disclosed means constituting, however, but one of various forms in for theprimary purpose of introducing chlorine in particularly advantageous form into the composition .and the amount of hexachloroethane which is added will, therefore, be dependent, in a measure at least, on the amount of chlorinewhich the composition should desirably contain.

Thegcompositions of our invention willpreferably contain a suflicient amount of hexachloro- Example. I.Above given will be found particularly suitable for use as a cutting oil, particularly where an emulsion type composition containing a large percentage of water is desired.

Example II .Likewise gave excellent performance as a cutting oil and as a matter of fact, drill tests on the two compositions and on plain lubricating oil showed Example II to be superior.

Drilling tests were conducted on a'composition similar-to Example I but containing no hexachloroethane. 632 inches of holes were drilled using this composition before the tool became so dull that drilling could not be continued. With a new tool and under the sameconditions of test and employing Example I, 1105 inches of holes were drilled before the tool became dulled and under similar conditions of test employing Example II, 3307 inches of holes were drilled before the tool became dulled.

In view of the general similarity in behavior between chlorine and bromine, it will be vident that the corresponding bromine compound, i. e., hexabromethane, may be employed for the purposes above stated instead of hexachloroet'hane.

Other modes of applying the principle of our invention may be employed instead of the one explained, change being made as regards the materials employed, provided the ingredients stated by any of the following claims or the equivalent l of such stated ingredients be employed.

We, therefore, particularly point out and distinctly claim as our invention:

1. A composition of matter comprising a major amount of mineral lubricating oil and minor amounts of hexachloroethane and sulfur.

2. A composition of matter comprising a major amount of mineral lubricating oil having dissolved therein minor amounts of hexachloroethane and a sulfur compound. 1

3. A composition of matter comprising a major amount of lubricating oil and minor amounts of hexachloroethane and an addition agent of the class consisting of sulphur and sulphur compounds.

I EDITH MORELL. Administratrizc of the Estate of Le Grand M orell.

Deceased.

AMOSiT. KNUTSON. 

